I agree that treating the room is definitely the best approach. I will not repeat any of the excellent advice already given.
However, if that is impossible, for either room constraints or spouse constraints (Boy, I know the later!), than rather than switching speaker cables, perhaps you could try something less expensive like switching out the interconnect between your source and preamp, or between your preamp and amp.
You might want to try a Cardas Golden Cross cable. It might just take the edge off the brightness. (A friend of mine used to use these cables to take the edge off his CD player.) You should easily be able to find a used pair on Audiogon (or Ebay) and give it a shot. If it does not work, you can easily get most of your money back. (You might want to ask any friends who are audiophiles to lend you some of their cables, so you can experiment. I have lent out cables for that purpose before.)
Just a thought. Good Luck!
However, if that is impossible, for either room constraints or spouse constraints (Boy, I know the later!), than rather than switching speaker cables, perhaps you could try something less expensive like switching out the interconnect between your source and preamp, or between your preamp and amp.
You might want to try a Cardas Golden Cross cable. It might just take the edge off the brightness. (A friend of mine used to use these cables to take the edge off his CD player.) You should easily be able to find a used pair on Audiogon (or Ebay) and give it a shot. If it does not work, you can easily get most of your money back. (You might want to ask any friends who are audiophiles to lend you some of their cables, so you can experiment. I have lent out cables for that purpose before.)
Just a thought. Good Luck!